Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d9f350e6200ef34cfe57bcd1afde3ed88bd08a6c456166ec7c3418d328bd3fc' 
  AND token = 'dChejzk4ws/sQSOqyW+FXHONFJRBP9Xj/mWU8gyaRbE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}